Steam-superheater.



No. 880,399. PATENTED FEB. 25

.M. PRAGER & E. L. HAYDEN.

STEAM SUPERHBATER. APPLICATION FILED-APR. 10. 1907.

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NO- 880,399. PATENTED FEB. 25. 1908. M. PRAGER 6: B. L. HAYDEN.

STEAM SUPERHBATER.

APPLICATION FILED APE.10, 1907.

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MOSES PRAGER AND ELMER L. HAYDEN, OF SAVANNAH, GEORGIA.

STEAM-SUPERHEATER,

Specification of Letters Patent.

Patented Feb. 25, 1908.

Application filed April 10. 1907. Serial No. 367.434.

To all whom it may concern:

Be it known that we, MosEs PRAGER and ELMER L. HAYDEN, citizens of theUnited States, both residing at Savannah, in the county of Chatham andState of Georgia, have invented certain new and useful Improvements inSteam-Superheaters; and we do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to improvements in superheaters for steam, and isprimarily designed to increase the efficiency of such apparatus by theemployment of a device both cheap and of a simple construction.

It is well understood that steam superheaters may be employed in anumber of relations, and while this particular device is designedprimarily'for use with laundry apparatus, such as small machines forshirt ironing, collars and cuffs, and mangles, still it is notrestricted to this limited use.

While we do not limit ourselves to the details shown and described, forthe purpose of disclosure reference is had to the accompanying drawings,illustrating a practical embodiment of the invention, in which likeletters designate the same parts in the several views, and in whichFigure l is a central vertical section through the superheater, theburner therefor being shown in elevation. Fig. 2 is a transverse sectionon the line of Fig. 1, and Fig. 3 is a diagrammatic view, showing asystem of steam piping with our invention coupled thereto.

Broadly, the invention consists of an inner and outer casing, detachablysecured together and provided internally with heating chambers andpassages for causing the live steam to pass in a zig-zag path throughthe superheater in contactional relation with the heated walls of theheating chambers and thence passing out of the apparatus in asuperheated state and conducted to any suitable machine for which a highheat is necessary and where the steam pressure is low.

1 designates the outer casing, preferably of cylindrical form and openat its lower end, said casing at its closed end being provided with anoutlet opening represented by the outlet pipe 2. The inner casing is ofa di ameter to snugly fit within the outer casing and consists of aplurality of heating chambers formed by spacing plates integrally castwith the walls of the cylinder and provided with passage-ways therein, acentral'opensecurely fastened to the base plate 3 in any suitablemanner, but in the drawings this is simply illustrated by lags 4Lpassing through the base 3 and into the walls of the outer cylinder.Superposed on said base plate 3 are a plurality of hollow castingsforming heating chambers 5 separated by spaced plates 6 and 7 solidcentrally as at 8, and forming passageways 9 therebetween, the centralor solid portions 8 being provided with an opening 10 for a purposehereinafter referred to.

It will be seen from the drawings that vertical passage-ways 11 areformed between the horizontal passage-ways 9, by the peculiarconstruction of the inner cylinder, a portion of the wall of which atdifferent positions opposite each heating chamber being inset as at 12,forming the passage ways 11 11 with the outer cylinder 1.

The openings 10 in the spacing plates are to allow the interior of theheating chambers to be highly heated, and this may be done in anysuitable way. In the drawings this is illustrated by a central burner 13extending therethrough, which burner may be fed by gas or hydrocarbonoils led through the supply pipe 14, which may be supported by asuitable bracket 15 threaded into the base plate 8.

In Fig. 3 we have illustrated an application of our superheater with asystem of steam pipes, wherein 16 designates the main supply providedwith a cook 17 and communicating with the branch pipes 18, 19 passing attheir lower ends through the outer cylinder 1 and discharging into thepassageway 9 formed between the base plate 3 and the spaced plate 7 atthe lower end of the inner cylinder. These branch pipes are providedwith cocks 18 -19 The outlet pipe -2 of the superheater extends by meansof a branch pipe 20 to what may be termed a steam chest 21 communicatingby a pipe 22, provided with a cock 22, leading to the As shown in thedrawings,

designates a valve controlled pipe for the air, and 28 a similar saldburner 13.

From the foregoing and referring particupipe for the gas fed to 7 larlyto Fig. 1, it will be seen that the live steam being conducted into thepass age-way 9 formed between the base plate 3 and the spaced plate 7,through the inlet pipe 3, passes across the superheater and up throughthe passage-way 11 thence transversely in the opposite direction throughone of the passageways 9 to a passage-way 11 on the entrance side of thecylinder and so on to the top where it passes through the passage-way 9formed by the unbroken head plates 1 2 and 3 of the outer and innercylinders.

The chambers 5 being highly heated by the burner and the walls thereofconsequently very hot, during the passage of the steam through thepassage-ways as described I the same being in contactional relation withthe heated walls is highly superheated and finally passes through thepassage-way 9 in contact with the late?) and out of the pipe 2, and itwill be 0 served that at the eXit end of the superheater, the steam hasthe largest and hottest heating surface to pass over, that is to say thehot plate 3*.

' The products of combustion may descend downwardly through the centralspace'alongside of the burner and discharge through the lower centralopening, but any other suitable means may be provided for carrying offthe exhaust products, and for the purpose of illustration in thedrawings a further means is shown as simply comprising a pair of aliningports'cut in the inner and outer cylinder at the bottom of the topheating chamber, as indicated at 29.

The operation of Fig. 3 is apparent, but it may be'referred to briefly:If it is not desir'ed to use the superheater, the cooks 18 19, 2 and 24being closed and the cocks 17 and 23 being open, the passage of steamwill be direct from the supply pipe 16 through the branch pipes 23 and20 to the steam chest 21, and with the cock 23 closed and the cooks 1819 and 2 open, the fresh steam will pass from the supply pipe 16 throughthe ranch pipes 18 and 19 to the superheater and thence out through theoutlet pipe 2 and through the connecting pipe'20 to the steam chest 21.The connecting pipe 24 may be employed for conducting any condensedsteam back to one of the branch supply pipes, it being re-converted intolive steam by passing around the coils 25-on the burner.

From the foregoing description and particularly referring to Fig. 1, itwillbe seen that we construct a very eflicient superheater embodyingsimplicity, strength and cheapness an d which may be readily detachedfor cleaning, and

Having thus described the invention what we claim is i 1. In asuperheater, the combination of an outer casing, an inner cylindercomprising a plurality of intercommunicating closed heating chambers,means for introducing 'a heating medium internally thereof, a recessbeing formed between said heating chambers and between said inner andouter cylinders forming a tortuous steam passageway through saidsuperheater eXteriorly of said heating chambers, means for introducinglive steam to said passageway, and means for conducting off thesuperheated steam, substantially as described.

2. In a superheater, the combination of an outer casing, an innercylinder therefor co1nprising a plurality of intercommunicating closedheating chambers separated from each other by spaced plates,- eachheating chamber being provided on the periphery of its vertical wallwith a recess located at a position different from the correspondingrecess of the next adjacent heating chamber, said 3' recesses formingwith the space between said spaced plates a tortuous passageway throughsaid superheater, means for introducing live steam into said passageway,means for conducting ofi' the superheated steam, and means forintroducing a heating medium directlyinto each of said heating chambers,substantially as described.

3. In a superheater, the combination of an I outer casing, an innercylinder provided with a plurality of heating chambers, and means forheating said chambers, the construction of said inner cylinder beingsuch that passageways are formed between said heating chambers andbetween the walls of said inner cylinder and outer casing for conductingthe passage of steam through said superheater in intimate contact withthe heated walls of said chambers, substantially as described.

4. In a superheater, the combination of a for conveying off the steamfrom between the outer and inner cylinder at the other end thereof,substantially as described.

5. In a superheater, the combination of a cylinder comprising a.plurality of heating chambers formed by inwardly extending horizontalchanneled separating plates, said cylinder being closed at its upper endand the periphery of said cylinder opposite each heating chamber beinginset at a position different to the inset portion of its adjacentheating chamber, an outer cylinder open at one end and snugly inclosingsaid inner cylinder and so associated therewith as to form a spacebetween the closed ends of said cylinder, communicating with the spaceformed by one of said inset portions, means for introducing steambetween said cylinder at one end thereof, and means for conducting offthe steam from the passage-way between said heads, substantially asdescribed.

6. In a superheater, the combination of an inner cylinder, comprising aplurality of heating chambers, formed from inwardly extending lateralchanneled separating plates, inset recesses being formed on theperiphery of said heating chambers at different positions relatively toits next adjacent heating chamber, and said inset recesses communicatingwith the channels formed in said separating plates, said inner cylinderbeing closed at its top and provided at its bottom with a spaced baseplate having a diameter greater than the diameter of the cylinderproper, an outer cylinder closed at one end and snugly fitting over saidinner cylinder and resting at its open end on the base plate of saidinner cylinder, a space being formedv between the closed ends of saidrespective cylinders and communicating with one of said inset recesses,means for conducting steam at one end between said cylinders, and

'an outlet pipe communicating with the space formed between the closedheads of said cylinders at the opposite end, substantially as described.

7. In a superheater, an inner cylinder comprising a base superposing aplurality of heating chambers formed by inwardly disposed channeledseparating plates vertically connected by the periphery of said cylinderand said periphery opposite each heating chamber having an inset recessat a position -diflerent to the next adjacent heating chamber, and saidseparating plates being formed solid centrally and provided withopenings therethrough, an outer cylinder closed at one end and at itsopen end resting on and secured to said base plate, a space being formedbetween the solid heads of said cylinders, an inlet pipe, an outletpipe, and a burner projecting through said openings in said separatingplates for heating said heating chambers,

substantially as described.

8. The combination with a superheater, of a supply pipe and a branchpipe connecting said supply pipe to said superheater, a branch outletpipe for said superheater leading to the machine utilizing thesuperheated steam, an intermediate pipe between said supply pipe andsaid outlet branch, and cocks controlling said respective pipes foreither leading the fresh steam directly to said branch outlet pipe orthrough said superheater to said branch outlet, a burner for saidsuperheater, and a condenser pipe forming communication between saidbranch outlet and said branch supply pipe, said condenser pipe beingcoiled around said burner, substantially as described.

In testimony whereof, we affix our signatures in presence of twowitnesses.

MOSES PRAGER. ELMER L. HAYDEN. Witnesses:

B. F. PHILLIP, HAROLD M. PRAGER.

